| 2 |
7u83 |
1 |
/*
|
|
|
2 |
Copyright (c) 1993 Open Software Foundation, Inc.
|
|
|
3 |
|
|
|
4 |
|
|
|
5 |
All Rights Reserved
|
|
|
6 |
|
|
|
7 |
|
|
|
8 |
Permission to use, copy, modify, and distribute this software
|
|
|
9 |
and its documentation for any purpose and without fee is hereby
|
|
|
10 |
granted, provided that the above copyright notice appears in all
|
|
|
11 |
copies and that both the copyright notice and this permission
|
|
|
12 |
notice appear in supporting documentation.
|
|
|
13 |
|
|
|
14 |
|
|
|
15 |
OSF DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING
|
|
|
16 |
ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
|
|
|
17 |
PARTICULAR PURPOSE.
|
|
|
18 |
|
|
|
19 |
|
|
|
20 |
IN NO EVENT SHALL OSF BE LIABLE FOR ANY SPECIAL, INDIRECT, OR
|
|
|
21 |
CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
|
|
|
22 |
LOSS OF USE, DATA OR PROFITS, WHETHER IN ACTION OF CONTRACT,
|
|
|
23 |
NEGLIGENCE, OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
|
|
|
24 |
WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
|
|
25 |
*/
|
|
|
26 |
|
|
|
27 |
/*
|
|
|
28 |
Crown Copyright (c) 1997
|
|
|
29 |
|
|
|
30 |
This TenDRA(r) Computer Program is subject to Copyright
|
|
|
31 |
owned by the United Kingdom Secretary of State for Defence
|
|
|
32 |
acting through the Defence Evaluation and Research Agency
|
|
|
33 |
(DERA). It is made available to Recipients with a
|
|
|
34 |
royalty-free licence for its use, reproduction, transfer
|
|
|
35 |
to other parties and amendment for any purpose not excluding
|
|
|
36 |
product development provided that any such use et cetera
|
|
|
37 |
shall be deemed to be acceptance of the following conditions:-
|
|
|
38 |
|
|
|
39 |
(1) Its Recipients shall ensure that this Notice is
|
|
|
40 |
reproduced upon any copies or amended versions of it;
|
|
|
41 |
|
|
|
42 |
(2) Any amended version of it shall be clearly marked to
|
|
|
43 |
show both the nature of and the organisation responsible
|
|
|
44 |
for the relevant amendment or amendments;
|
|
|
45 |
|
|
|
46 |
(3) Its onward transfer from a recipient to another
|
|
|
47 |
party shall be deemed to be that party's acceptance of
|
|
|
48 |
these conditions;
|
|
|
49 |
|
|
|
50 |
(4) DERA gives no warranty or assurance as to its
|
|
|
51 |
quality or suitability for any purpose and DERA accepts
|
|
|
52 |
no liability whatsoever in relation to any use to which
|
|
|
53 |
it may be put.
|
|
|
54 |
*/
|
|
|
55 |
|
|
|
56 |
|
|
|
57 |
#include "ossg.h"
|
|
|
58 |
|
|
|
59 |
/* from float.h */
|
|
|
60 |
#define FP_RND_RZ 0
|
|
|
61 |
#define FP_RND_RN 1
|
|
|
62 |
#define FP_RND_RP 2
|
|
|
63 |
#define FP_RND_RM 3
|
|
|
64 |
|
|
|
65 |
typedef unsigned short fprnd_t ;
|
|
|
66 |
extern fprnd_t fp_read_rnd PROTO_S ( ( void ) ) ;
|
|
|
67 |
extern fprnd_t fp_swap_rnd PROTO_S ( ( fprnd_t ) ) ;
|
|
|
68 |
|
|
|
69 |
/* from math.h */
|
|
|
70 |
extern unsigned uitrunc PROTO_S ( ( double ) ) ;
|
|
|
71 |
extern int itrunc PROTO_S ( ( double ) ) ;
|
|
|
72 |
extern double rint PROTO_S ( ( double ) ) ;
|
|
|
73 |
|
|
|
74 |
/* from limits.h */
|
|
|
75 |
#define INT_MAX ( 2147483647 )
|
|
|
76 |
#define INT_MIN ( -( INT_MAX + 1 ) )
|
|
|
77 |
|
|
|
78 |
extern int __TDFrnd_error ;
|
|
|
79 |
extern unsigned int __TDFrnd_unsgned PROTO_S ( ( double, fprnd_t ) ) ;
|
|
|
80 |
extern int __TDFrnd_sgned PROTO_S ( ( double, fprnd_t ) ) ;
|
|
|
81 |
extern void __TDFerr_rnd_unsgned PROTO_S ( ( double, fprnd_t ) ) ;
|
|
|
82 |
extern void __TDFerr_rnd_sgned PROTO_S ( ( double, fprnd_t ) ) ;
|
|
|
83 |
|
|
|
84 |
int __TDFrnd_error = 0 ;
|
|
|
85 |
|
|
|
86 |
unsigned int __TDFrnd_unsgned
|
|
|
87 |
PROTO_N ( ( f, rnd_mode ) )
|
|
|
88 |
PROTO_T ( double f X fprnd_t rnd_mode )
|
|
|
89 |
{
|
|
|
90 |
fprnd_t swap ;
|
|
|
91 |
unsigned int ret_value ;
|
|
|
92 |
swap = fp_swap_rnd ( rnd_mode ) ;
|
|
|
93 |
ret_value = uitrunc ( rint ( f ) ) ;
|
|
|
94 |
( void ) fp_swap_rnd ( swap ) ;
|
|
|
95 |
return ( ret_value ) ;
|
|
|
96 |
}
|
|
|
97 |
|
|
|
98 |
int __TDFrnd_sgned
|
|
|
99 |
PROTO_N ( ( f, rnd_mode ) )
|
|
|
100 |
PROTO_T ( double f X fprnd_t rnd_mode )
|
|
|
101 |
{
|
|
|
102 |
fprnd_t swap ;
|
|
|
103 |
int ret_value ;
|
|
|
104 |
swap = fp_swap_rnd ( rnd_mode ) ;
|
|
|
105 |
ret_value = itrunc ( rint ( f ) ) ;
|
|
|
106 |
( void ) fp_swap_rnd ( swap ) ;
|
|
|
107 |
return ( ret_value );
|
|
|
108 |
}
|
|
|
109 |
|
|
|
110 |
void __TDFerr_rnd_unsgned
|
|
|
111 |
PROTO_N ( ( f, rnd_mode ) )
|
|
|
112 |
PROTO_T ( double f X fprnd_t rnd_mode )
|
|
|
113 |
{
|
|
|
114 |
double fmin = 0.0 ;
|
|
|
115 |
double fmax = 4294967295.0 ;
|
|
|
116 |
switch ( rnd_mode ) {
|
|
|
117 |
case FP_RND_RN : {
|
|
|
118 |
fmin += -0.5 ;
|
|
|
119 |
fmax += 0.5 ;
|
|
|
120 |
if ( f < fmin || f > fmax ) {
|
|
|
121 |
__TDFrnd_error = 1 ;
|
|
|
122 |
} else {
|
|
|
123 |
__TDFrnd_error = -1 ;
|
|
|
124 |
}
|
|
|
125 |
break ;
|
|
|
126 |
}
|
|
|
127 |
case FP_RND_RZ : {
|
|
|
128 |
fmin += -1.0 ;
|
|
|
129 |
fmax += 1.0 ;
|
|
|
130 |
if ( f <= fmin || f >= fmax ) {
|
|
|
131 |
__TDFrnd_error = 1 ;
|
|
|
132 |
} else {
|
|
|
133 |
__TDFrnd_error = -1 ;
|
|
|
134 |
}
|
|
|
135 |
break ;
|
|
|
136 |
}
|
|
|
137 |
case FP_RND_RP : {
|
|
|
138 |
fmin += -1.0 ;
|
|
|
139 |
if ( f <= fmin || f > fmax ) {
|
|
|
140 |
__TDFrnd_error = 1 ;
|
|
|
141 |
} else {
|
|
|
142 |
__TDFrnd_error = -1 ;
|
|
|
143 |
}
|
|
|
144 |
break ;
|
|
|
145 |
}
|
|
|
146 |
case FP_RND_RM : {
|
|
|
147 |
fmax += 1.0 ;
|
|
|
148 |
if ( f < fmin || f >= fmax ) {
|
|
|
149 |
__TDFrnd_error = 1 ;
|
|
|
150 |
} else {
|
|
|
151 |
__TDFrnd_error = -1 ;
|
|
|
152 |
}
|
|
|
153 |
break ;
|
|
|
154 |
}
|
|
|
155 |
}
|
|
|
156 |
return ;
|
|
|
157 |
}
|
|
|
158 |
|
|
|
159 |
void __TDFerr_rnd_sgned
|
|
|
160 |
PROTO_N ( ( f, rnd_mode ) )
|
|
|
161 |
PROTO_T ( double f X fprnd_t rnd_mode )
|
|
|
162 |
{
|
|
|
163 |
double fmin = -2147483648.0 ;
|
|
|
164 |
double fmax = 2147483647.0 ;
|
|
|
165 |
|
|
|
166 |
switch ( rnd_mode ) {
|
|
|
167 |
case FP_RND_RN : {
|
|
|
168 |
fmin += -0.5 ;
|
|
|
169 |
fmax += 0.5 ;
|
|
|
170 |
if ( f < fmin || f > fmax ) {
|
|
|
171 |
__TDFrnd_error = 1 ;
|
|
|
172 |
} else {
|
|
|
173 |
__TDFrnd_error = -1 ;
|
|
|
174 |
}
|
|
|
175 |
break ;
|
|
|
176 |
}
|
|
|
177 |
case FP_RND_RZ : {
|
|
|
178 |
fmin += -1.0 ;
|
|
|
179 |
fmax += 1.0 ;
|
|
|
180 |
if ( f <= fmin || f >= fmax ) {
|
|
|
181 |
__TDFrnd_error = 1 ;
|
|
|
182 |
} else {
|
|
|
183 |
__TDFrnd_error = -1 ;
|
|
|
184 |
}
|
|
|
185 |
break ;
|
|
|
186 |
}
|
|
|
187 |
case FP_RND_RP : {
|
|
|
188 |
fmin += -1.0 ;
|
|
|
189 |
if ( f <= fmin || f > fmax ) {
|
|
|
190 |
__TDFrnd_error = 1 ;
|
|
|
191 |
} else {
|
|
|
192 |
__TDFrnd_error = -1 ;
|
|
|
193 |
}
|
|
|
194 |
break ;
|
|
|
195 |
}
|
|
|
196 |
case FP_RND_RM : {
|
|
|
197 |
fmax += 1.0 ;
|
|
|
198 |
if ( f < fmin || f >= fmax ) {
|
|
|
199 |
__TDFrnd_error = 1 ;
|
|
|
200 |
} else {
|
|
|
201 |
__TDFrnd_error = -1 ;
|
|
|
202 |
}
|
|
|
203 |
break;
|
|
|
204 |
}
|
|
|
205 |
}
|
|
|
206 |
return ;
|
|
|
207 |
}
|